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Collapse of unusual hybrid concrete and steel strand truss on school roof
This report concerns the collapse of a school hall roof which resulted from the failure of one of a number of unusual hybrid concrete and steel strand trusses. The trusses consist of a precast reinforced concrete top chord and verticals with a bottom chord of tensioned steel strands. The failure of the truss resulted in the collapse of the supported flat roof local to the failed truss, and da...
25 May 2023
CROSS Safety Report
Report ID: 1227
Region: CROSS-UK
Durability issues with engineered timber
A reporter has observed durability issues with engineered timber when there is water ingress or condensation issues. It appears to disintegrate significantly more than a conventional timber, resulting in structural failure rather than distortion.
21 February 2024
CROSS Safety Report
Report ID: 1275
Region: CROSS-UK
Very slender props
A reporter noticed prop that did not have ties installed while carrying out a site inspection.
1 July 2007
CROSS Safety Report
Report ID: 34
Region: CROSS-UK
Late detection of flange/web splitting on steel beam
A reporter noticed a crack at the interface between the flange and web for a chord member in a steel truss while it was being loaded on to a delivery truck.
1 October 2019
CROSS Safety Report
Report ID: 680
Region: CROSS-UK
Design deficiencies in long span steelwork portal
A firm commissioned to design steel joints on a large portal frame structure noticed that there was lack of restraint to a series of long span rafters.
1 October 2013
CROSS Safety Report
Report ID: 329
Region: CROSS-UK
Rotting of cross-laminated timber (CLT) roof panels
This report highlights how a reporter discovered rotted CLT roof panels during the investigation of a roof that had been leaking for a few years.
1 October 2019
CROSS Safety Report
Report ID: 852
Region: CROSS-UK
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